Convert MetOffice to use UI for configuration (#34900)

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

tests/components/metoffice/conftest.py

@@ -0,0 +1,22 @@
+"""Fixtures for Met Office weather integration tests."""
+from datapoint.exceptions import APIException
+import pytest
+
+from tests.async_mock import patch
+
+
+@pytest.fixture()
+def mock_simple_manager_fail():
+    """Mock datapoint Manager with default values for testing in config_flow."""
+    with patch("datapoint.Manager") as mock_manager:
+        instance = mock_manager.return_value
+        instance.get_nearest_forecast_site.side_effect = APIException()
+        instance.get_forecast_for_site.side_effect = APIException()
+        instance.latitude = None
+        instance.longitude = None
+        instance.site = None
+        instance.site_id = None
+        instance.site_name = None
+        instance.now = None
+
+        yield mock_manager